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WO2019239503A1 - Terminal utilisateur - Google Patents

Terminal utilisateur Download PDF

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Publication number
WO2019239503A1
WO2019239503A1 PCT/JP2018/022476 JP2018022476W WO2019239503A1 WO 2019239503 A1 WO2019239503 A1 WO 2019239503A1 JP 2018022476 W JP2018022476 W JP 2018022476W WO 2019239503 A1 WO2019239503 A1 WO 2019239503A1
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WO
WIPO (PCT)
Prior art keywords
dci
transmission
transmitted
predetermined
information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/022476
Other languages
English (en)
Japanese (ja)
Inventor
祐輝 松村
聡 永田
ジン ワン
ギョウリン コウ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Docomo Inc
Original Assignee
NTT Docomo Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NTT Docomo Inc filed Critical NTT Docomo Inc
Priority to PCT/JP2018/022476 priority Critical patent/WO2019239503A1/fr
Priority to EP18922202.9A priority patent/EP3809773A4/fr
Priority to JP2020524996A priority patent/JP7252223B2/ja
Priority to CN201880096129.3A priority patent/CN112640547B/zh
Priority to US17/251,716 priority patent/US20210127374A1/en
Publication of WO2019239503A1 publication Critical patent/WO2019239503A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space

Definitions

  • the present disclosure relates to a user terminal in a next generation mobile communication system.
  • LTE Long Term Evolution
  • LTE-A also referred to as LTE Advanced, LTE Rel. 10, 11 or 12
  • LTE Long Term Evolution
  • Successor systems for example, FRA (Future Radio Access), 5G (5th generation mobile communication system), NR (New Radio), NX (New radio access), FX (Future generation radio access), LTE Rel. 13, 14 or (Also referred to as after 15).
  • a user terminal In an existing LTE system (for example, LTE Rel. 8-13), a user terminal (UE: User Equipment) is based on downlink control information (DCI: Downlink Control Information, also called DL assignment) from a radio base station. Then, reception of a downlink shared channel (for example, PDSCH: Physical Downlink Shared Channel) is controlled. Further, the user terminal controls transmission of an uplink shared channel (for example, PUSCH: Physical Uplink Shared Channel) based on DCI (also referred to as UL grant or the like).
  • DCI Downlink Control Information
  • PUSCH Physical Uplink Shared Channel
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • BF beam forming
  • a DL signal for example, PDSCH
  • PDSCH downlink control information
  • the UE needs to monitor (or detect) a downlink control channel used for transmission of the DCI, but specific processing has not been sufficiently studied. If the reception process of the downlink control information or the downlink control channel is not appropriately performed, the quality of communication using a plurality of transmission points may be deteriorated.
  • This indication is made in view of this point, and it is one of the objectives to provide a user terminal which can perform communication appropriately, even when communicating using a plurality of transmission points. To do.
  • the user terminal which concerns on 1 aspect of this indication monitors the downlink control channel and receives the 1 or more downlink control information utilized for the scheduling of the downlink shared channel transmitted from a some transmission point, and reception And a control unit that determines the number of downlink control information transmitted in a predetermined period based on information included in the downlink control information.
  • communication can be appropriately performed even when communication is performed using a plurality of transmission points.
  • FIG. 1A and 1B are diagrams illustrating an example in which PDSCH is transmitted from a plurality of transmission points.
  • FIG. 2 is a diagram illustrating an example of a PDCCH configuration notified to the UE.
  • FIG. 3 is a diagram illustrating an example of association between a search space and PDSCH related information.
  • FIG. 4 is a diagram illustrating an example of association between a control resource set and PDSCH related information.
  • FIG. 5 is a diagram illustrating an example when a PDCCH configuration is set for each DCI.
  • FIG. 6 is a diagram illustrating an example of association between a search space and PDSCH related information.
  • FIG. 7 is a diagram illustrating an example of PDSCH and DCI transmission control from a plurality of transmission points in each slot.
  • FIG. 8A and 8B are diagrams for explaining DCI fields transmitted from a plurality of transmission points to the UE.
  • FIG. 9 is a diagram illustrating an example of each DCI field.
  • FIG. 10 is a diagram illustrating an example of a DCI field including the total number of DCIs and a count value.
  • FIG. 11 is a diagram illustrating an example of a schematic configuration of the wireless communication system according to the present embodiment.
  • FIG. 12 is a diagram illustrating an example of the overall configuration of the radio base station according to the present embodiment.
  • FIG. 13 is a diagram illustrating an example of a functional configuration of the radio base station according to the present embodiment.
  • FIG. 14 is a diagram illustrating an example of the overall configuration of the user terminal according to the present embodiment.
  • FIG. 15 is a diagram illustrating an example of a functional configuration of the user terminal according to the present embodiment.
  • FIG. 16 is a diagram illustrating an example of a hardware configuration of the radio base station and the user terminal according to the present embodiment
  • non-coherent DL for example, PDSCH
  • transmission in which non-coherent DL signals (or DL channels) are coordinated from a plurality of transmission points may be called NCJT (Non-Coherent Joint Transmission).
  • the transmission point may be read as a transmission / reception point (TRP), a panel, or a cell.
  • scheduling of non-coherent PDSCH transmitted from each of a plurality of transmission points is controlled using one or more DCIs.
  • DCIs For example, in order to schedule PDSCH transmitted from a plurality of transmission points, at least one of a plurality of downlink control channels (for example, PDCCH) and DCI is used.
  • FIG. 1A shows a case where PDSCH (for example, PDSCH using NCJT) is transmitted from a plurality of panels to the UE
  • FIG. 1B shows PDSCH (for example, PDSCH using NCJT) from a plurality of transmission / reception points (TRP). Is transmitted to the UE.
  • PDSCH for example, PDSCH using NCJT
  • TRP transmission / reception points
  • DCI for scheduling of PDSCH transmitted from each transmission point for example, panel or TRP.
  • each transmission point for example, panel or TRP.
  • the present inventors pay attention to the fact that information on the control resource set and the search space is included in the PDCCH configuration set in the UE, and transmit the PDCCH related information and each transmission point.
  • the idea was to associate and set PDSCH related information.
  • the present inventors have conceived as another aspect of the present disclosure that the predetermined DCI is notified to the UE including information on the number of DCIs transmitted from a plurality of transmission points in a predetermined period.
  • the transmission point shown below may be read as at least one of the panel and the transmission / reception point.
  • the PDCCH related information and the PDSCH related information transmitted from each transmission point are set in association with each other.
  • the PDCCH related information may be at least one of a PDCCH configuration (PDCCH-Config), a search space (Search Space), and a control resource set (CORESET: Control Resource Set).
  • the PDSCH related information is information (index indication) related to at least one of PDSCH, codeword, DMRS port group, and transmission point, which is used to receive PDSCH from each transmission point. Also good. Also, the PDSCH related information may be called related information of each transmission point.
  • the PDCCH configuration includes information on the control resource set (for example, control resource set ID) and information on the search space set (for example, search space set ID), and notifies the UE in an upper layer (for example, RRC signaling). (See FIG. 2).
  • the PDCCH configuration set in the higher layer is used for setting UE-specific PDCCH parameters such as a control resource set, a search space, and additional parameters in order for the UE to acquire PDCCH.
  • the PDCCH configuration set in the higher layer may be referred to as an information element for PDCCH configuration (PDCCH-Config IE).
  • the base station may notify the UE of information related to the search space and the control resource set in each higher layer.
  • the search space information notified in the upper layer may be referred to as an information element for search space set (IE SearchSpace).
  • the information of the control resource set notified in the upper layer may be referred to as an information element (IE ControlResourceSet) for the control resource set.
  • the information element for the search space set sets how or where to search for PDCCH candidates (PDCCH candidates) in the UE.
  • Each search space is associated with one control resource set.
  • Information elements for the search space set include, for example, a search space set ID (searchSpaceId), a control resource set ID (controlResourceSetId), a monitoring slot period and offset (monitoringSlotPeriodicityAndOffset), a monitoring symbol (monitoringSymbolsWithinSlot) in each slot, and each aggregation
  • searchSpaceId search space set ID
  • controlResourceSetId control resource set ID
  • monitoring slot period and offset monitoring symbol
  • monitoring symbol monitoring symbol
  • each aggregation The number of level candidates (nrofCandidates), a search space type (searchSpaceType) indicating a common search space or a UE-specific search space, and the like are included.
  • the information element for the control resource set sets the time and frequency (time / frequency) of the control resource set for searching DCI in the UE.
  • the information element for the control resource set includes, for example, a control resource set ID (controlResourceSetId), a frequency domain resource (frequencyDomainResouces), a period indicating a time domain (duration), and a control channel element (CCE) for a resource element group (REG).
  • cce-REG-MappingType precoder granularity in frequency domain (precoderGranularity), TCI state of PDCCH (tci-StatesPDCCH), presence / absence of TCI field in DCI (tci-PresentInDCI), scrambling of DMRS for PDCCH ID (pdcch-DMRS-ScramblingID) etc. are included.
  • the base station sets information on the maximum number (for example, N) that the UE can simultaneously receive for DCI transmitted from a plurality of transmission points using the upper layer (for example, RRC signaling) in the UE.
  • the UE receives DCI (for example, DCI actually transmitted) transmitted to the UE in a predetermined period (for example, a slot, a predetermined symbol period, or a subframe).
  • the reception process is performed assuming that: For example, if the UE detects N DCIs in a predetermined period, the UE may control to stop subsequent DCI reception processing. Thereby, the load of the reception process can be reduced.
  • the base station sets association (or association) between PDCCH related information (for example, at least one of a PDCCH configuration, a search space, and a control resource set) and PDSCH related information in the UE in an upper layer or the like.
  • PDCCH related information for example, at least one of a PDCCH configuration, a search space, and a control resource set
  • the PDSCH related information may be information regarding at least one index of the PDSCH, codeword, DMRS port group, and transmission point for receiving the PDSCH from each transmission point.
  • the UE monitors the PDCCH and receives DCI in at least one of a predetermined PDCCH configuration, search space, and control resource set based on the association information notified from the base station. Accordingly, the UE can perform reception processing by determining at least one of the PDSCH transmitted from each transmission point and the PDCCH configuration, search space, and control resource set in which DCI for scheduling the PDSCH is transmitted. .
  • the UE may assume that the maximum number (M) of transmission points at which PDSCH is transmitted in a predetermined period is N or more (N ⁇ M).
  • the base station may be set so that at least one of the search space ID and the control resource set ID is unique for a plurality of DCIs transmitted from a plurality of transmission points.
  • FIG. 3 shows an example in which unique search space IDs are set for a plurality of DCIs transmitted from a plurality of transmission points.
  • the search space configuration is associated with PDSCH related information corresponding to a predetermined transmission point. Specifically, PDSCH related information (# 0 or # 1) corresponding to any transmission point is associated with each search space ID.
  • FIG. 3 shows a case where the PDSCH related information # 0 transmitted from the transmission point # 0 is associated with the search space IDs # 0, # 1, etc., respectively. Also, PDSCH related information # 1 transmitted from transmission point # 0 is associated with search space IDs # B-2, # B-1, etc., respectively.
  • the UE determines that the PDSCH is transmitted from transmission point # 0. On the other hand, if the UE detects DCI using search space IDs # B-2, # B-1, etc., it determines that the UE is a PDSCH transmitted from transmission point # 1.
  • FIG. 4 shows an example in which unique control resource set IDs are set for a plurality of DCIs transmitted from a plurality of transmission points.
  • the control resource set configuration is associated with PDSCH related information corresponding to a predetermined transmission point. Specifically, PDSCH related information (# 0, # 1 or # 2) corresponding to any transmission point is associated with each control resource set ID.
  • FIG. 4 shows a case where PDSCH related information # 0 transmitted from transmission point # 0 is associated with control resource set IDs # 0, # 1, etc., respectively. Further, PDSCH related information # 1 transmitted from transmission point # 1 is associated with control resource set ID #x and the like, respectively. In addition, a case is shown in which PDSCH related information # 2 transmitted from transmission point # 2 is associated with control resource set ID # A-1 or the like.
  • the UE When the UE detects DCI with control resource set IDs # 0, # 1, etc., it determines that the UE is a PDSCH transmitted from transmission point # 0. When the UE detects DCI using the control resource set ID # x or the like, the UE determines that the PDSCH is transmitted from the transmission point # 1. When the UE detects DCI using the control resource set ID # A-1 or the like, the UE determines that the PDSCH is transmitted from the transmission point # 2.
  • the base station may set the DCI transmitted from one transmission point so that at least one of the search space ID and the control resource set ID is unique.
  • the ID may be set separately over a plurality of transmission points.
  • the search space and the control resource set may be set in association with the corresponding PDCCH configuration ID (for example, the PDSCH related information and the PDCCH configuration are associated with each other).
  • FIG. 5 shows an example in which a unique search space ID and a unique control resource set ID are set for DCI transmitted from one transmission point.
  • the PDCCH configuration including a predetermined search space ID and control resource set ID is associated with PDSCH related information corresponding to a predetermined transmission point.
  • PDSCH related information (# 0 or # 1) corresponding to any transmission point is associated with each PDCCH configuration ID.
  • PDSCH related information # 0 transmitted from transmission point # 0 for PDCCH configuration ID # 0 including control resource set IDs # 0 to # A-1 and search space IDs # 0 to # B-1 Shows the case where is associated.
  • PDSCH related information # transmitted from transmission point # 1 to PDCCH configuration ID # 1 including control resource set IDs # 0 to # A'-1 and search space IDs # 0 to # B'-1 The case where 0 is matched is shown.
  • the UE When the UE detects DCI with the PDCCH configuration ID # 0, the UE determines that the PDSCH is transmitted from the transmission point # 0. When the UE detects DCI using PDCCH configuration ID # 1, it determines that the UE is a PDSCH transmitted from transmission point # 1. Thus, by associating the PDCCH configuration with each DCI transmitted from each transmission point, the UE can control the detection of DCI based on the PDCCH configuration ID.
  • a plurality of types of aggregation levels are defined in the search space.
  • the AL corresponds to the number of resource units (for example, control channel elements (CCE)) constituting the DCI.
  • CCE control channel elements
  • AL may be referred to as a CCE aggregation level.
  • the search space has a plurality of PDCCH candidates for a certain AL. For example, predetermined PDCCH candidates may be set corresponding to AL (1, 2, 4, 8, 16), respectively.
  • the UE may assume that a plurality of DCIs (CCEs constituting each DCI) are at the same aggregation level. .
  • the base station may apply the same aggregation level to a plurality of DCIs transmitted to the UE. Thereby, since the AL monitored by the user terminal can be reduced, it is possible to reduce the reception process of the UE or the number of times of decoding.
  • MCL Maximum Coupling Loss
  • the aggregation level applied to a plurality of DCIs may be limited.
  • the UE may perform the reception process assuming that the aggregation level of one DCI is X and the aggregation level of another DCI is X or less (or less than X). Since the number of CCEs increases when the aggregation level is high, problems such as blocking occur when the aggregation level of a plurality of DCIs is increased. Therefore, it is possible to reduce the occurrence of blocking by increasing some of the aggregation levels of DCI.
  • the UE instructs or activates PDCCH related information corresponding to a transmission point for monitoring DCI from the base station.
  • the base station uses at least one of a PDCCH configuration, a search space, and a control resource set for a transmission point where the UE should monitor DCI using a predetermined DL signal (eg, MAC control information (MAC CE)). Notify or activate.
  • a predetermined DL signal eg, MAC control information (MAC CE)
  • the number of transmission points (or the number of DCI configurations) set in the UE is larger than the maximum number (N) of DCIs that the UE can simultaneously receive in a predetermined period.
  • N the maximum number of DCIs that the UE can simultaneously receive in a predetermined period.
  • FIG. 6 shows an example when the base station notifies the UE of information related to DCI to be monitored.
  • the information on DCI to be monitored notified from the base station to the UE may be at least one of a predetermined PDCCH configuration, a search space, and a control resource set.
  • the information on DCI to be monitored notified from the base station to the UE may be at least one of information specifying a transmission point and PDSCH related information.
  • the base station uses a higher layer or the like to set the PDCCH configuration for transmission points # 0, # 1, and # 2.
  • N the maximum number of DCI that can be received by the UE in a predetermined period is two.
  • a PDCCH configuration including control resource set IDs # 0 to # A-1 and search space IDs # 0 to # B-1 is set for the UE.
  • PDSCH related information # 0 transmitted from transmission point # 0 is associated with search space ID # 0 and the like.
  • PDSCH related information # 1 transmitted from transmission point # 1 is associated with search space ID #x and the like.
  • PDSCH related information # 2 transmitted from transmission point # 2 is associated with search space ID # B-1 and the like.
  • the base station uses the MAC CE so that the UE monitors up to N (here, 2) DCIs, and uses at least one of the PDCCH configuration, the search space, and the control resource set (here, the search space ID). ) Is specified or activated.
  • the base station may search for a search space ID corresponding to at least one of transmission points # 0 and # 1, a search space ID corresponding to at least one of transmission points # 1 and # 2, or at least transmission points # 0 and # 2.
  • One of the search space IDs corresponding to one is notified.
  • a search space ID corresponding to at least one of transmission points # 0 and # 1 is a search space ID corresponding to only transmission point # 0, a search space ID corresponding to only transmission point # 1, or transmission points # 0 and # 1. Either of the search space IDs corresponding to both of them may be used.
  • the base station may specify or activate at least one of a PDCCH configuration, a search space, and a control resource set using MAC CE so that the UE monitors less than N (eg, 1) DCI. .
  • N eg, 1
  • the base station notifies one of PDCCH related information corresponding to transmission point # 0, PDCCH related information corresponding to transmission point # 1, or PDCCH related information corresponding to transmission point # 2.
  • the load of UE reception processing is reduced. Can do.
  • DCI reception processing for example, the number of DCIs to be decoded
  • the UE is controlled based on information notified from the base station.
  • the base station sets the maximum number of DCIs (N) received by the UE simultaneously (or within a predetermined period) for a plurality of transmission points using at least one of the upper layer and the MAC CE. For example, when N> 1, the UE needs to continue the DCI decoding process in the search space or the control resource set until N DCIs are received simultaneously (or within a predetermined period).
  • N DCIs are not necessarily transmitted in a certain period, and there may be cases where fewer DCIs are actually transmitted. In such a case, if the UE performs the reception process assuming that N DCIs are transmitted in each period, the load of the reception process may increase.
  • the UE is notified of information related to DCI that is actually transmitted in a predetermined period.
  • the base station may notify the UE of information regarding the number of DCIs that are actually transmitted in a predetermined period, either explicitly or implicitly. For example, information on the number of DCIs is notified to the UE using a predetermined field included in predetermined DCI (or DCI format).
  • the number of DCIs is notified to the UE using a predetermined field composed of 1 bit.
  • the number of DCIs transmitted when the bit value is “0” may be 1
  • the number of bits transmitted when the bit value is “1” may be N (for example, 2).
  • the UE can determine the number of DCIs actually transmitted simultaneously (or during a predetermined period) based on a predetermined field included in the received DCI (for example, the first DCI received). Further, the UE can determine whether or not the UE misses detection of another DCI based on a predetermined field of DCI.
  • FIG. 7 shows an example of notifying the UE of the number of DCIs transmitted from a plurality of transmission points in each predetermined period (here, a slot).
  • DCI (a total of two DCIs) is transmitted from transmission points # 0 and # 1, so the base station notifies the UE of the bit value of a predetermined field of DCI as “1”.
  • the base station In slot # 1, since DCI (for example, one DCI) is transmitted from transmission point # 0, the base station notifies the UE of the bit value of a predetermined field of DCI as “0”. In slot # 3, since DCI (for example, one DCI) is transmitted from transmission point # 1, the base station notifies the UE of the bit value of a predetermined field of DCI as “0”. When a plurality of (for example, two) DCIs are transmitted from one transmission point, the base station may notify the UE of the bit value of a predetermined field of DCI as “1”.
  • the base station uses a predetermined field included in a predetermined DCI (or DCI format) to transmit a DCI transmission point actually transmitted in a predetermined period, a PDSCH corresponding to the actually transmitted DCI, a codeword,
  • the UE may be notified of at least one of the DMRS port group and the PDCCH configuration ID.
  • DCI eg, 1DCI
  • DCI eg, 1DCI
  • transmission point # 1 when the bit value is “00”, DCI (eg, 1DCI) is transmitted from transmission point # 0 and when the bit value is “01”, DCI (eg, 1DCI) is transmitted from transmission point # 1.
  • DCI for example, 2DCI
  • NCJT NCJT
  • DCI for scheduling the PDJ of NCJT is transmitted from transmission points # 0 and # 1, respectively, so the base station sets the bit value of a predetermined field of DCI to “10”.
  • the base station since DCI is transmitted from transmission point # 0, the base station notifies the UE of the bit value of a predetermined field of DCI as “00”.
  • slot # 3 since DCI is transmitted from transmission point # 1, the base station notifies the UE of the bit value of a predetermined field of DCI as “01”.
  • the predetermined field included in the DCI may be a field set for notifying the number of DCIs or a DCI transmission point, or may be a field for other purposes.
  • the field for other use may be at least one of a field used for rate matching (RM) notification and a field used for pseudo collocation (QCL) notification.
  • RM rate matching
  • QCL pseudo collocation
  • the following UE capability information may be set in communication using a plurality of transmission points.
  • the following UE capability information may be set for each UE or may be set for each transmission point.
  • the UE capability information (1) to (4) may be defined as the same value for each transmission point, or may be defined as different values.
  • B in FIGS. 3, 4 and 6 is equal to or less than P (B ⁇ P)
  • the search space configuration associated with the PDSCH instruction in FIGS. Or less than P For example, B / 2 ⁇ P in FIG. 3 and B ⁇ P and B ′ ⁇ P in FIG. 6 may be used.
  • the UE may determine whether or not a plurality of DCIs are transmitted in a predetermined period based on the received DCI or the number of DCIs to be transmitted (see FIG. 8).
  • FIG. 8A illustrates a case where the UE receives DCSCH for scheduling of PDSCH transmitted from transmission point # 0 and transmission point # 1, respectively.
  • FIG. 8B shows an example of fields included in DCI.
  • the UE determines that there is one DCI transmitted to the UE. In this case, the UE may perform control so as to stop the detection of DCI when one DCI is detected in a predetermined period.
  • the UE may determine that a plurality of DCIs are transmitted.
  • the predetermined field may be included only in predetermined DCI, or may be included in each DCI. Or even if it is a case where a predetermined field is contained in each DCI, UE may judge the number of DCI transmitted based on the predetermined field contained in predetermined DCI.
  • the number of bits of the predetermined field included in DCI may be 1 bit, or may be greater than 1 (for example, y bits (y> 1)).
  • y bits y bits
  • the UE may determine whether one or more DCIs are transmitted to the UE in a predetermined period (for example, a slot) based on a bit value of a predetermined field included in the predetermined DCI. For example, when the bit value of the predetermined field is the first value (for example, “0”), the UE determines that only one DCI (for example, the predetermined DCI) is transmitted to the UE. In this case, the UE may be controlled not to perform an operation (for example, decoding process) for receiving other DCI.
  • the UE determines that a plurality of DCIs (for example, other DCIs other than the predetermined DCI) are transmitted to the UE. . In this case, the UE may control the reception process assuming the maximum number (N) of DCI notified from the base station.
  • the predetermined DCI may be a DCI having the lowest CCE index and / or aggregation level.
  • the UE may determine whether or not a plurality of DCIs are transmitted based on a predetermined field included in the DCI having the smallest CCE index and the lowest aggregation level.
  • the predetermined field may be included only in specific DCIs (for example, DCI having the lowest CCE index or aggregation level among the received DCIs).
  • a predetermined field may be included in a plurality of DCIs (for example, all DCIs).
  • the base station may notify information on the number of DCIs to be detected by the UE using a predetermined field included in a predetermined DCI corresponding to a predetermined AL and a predetermined CCE index. That is, the UE may assume that the number of DCIs to be detected by the UE is notified by a predetermined field included in the predetermined DCI corresponding to the predetermined AL and the predetermined CCE index.
  • the UE may detect the number of DCIs to be detected based on a bit value of a predetermined field included in the predetermined DCI having at least one of the AL and CCE indexes. To decide.
  • DCI having the lowest CCE among the DCI having the lowest AL may be set as the predetermined DCI.
  • DCI (1) AL1 and CCE index 15, predetermined bit field “11”
  • DCI (2) AL1 and CCE index 16
  • DCI (3) AL4 and CCE index 8
  • DCI (4) AL8 and CCE index 0, predetermined bit field “00”
  • a case where the DCI having the lowest CCE among the DCI having the lowest AL is set as the predetermined DCI is taken as an example.
  • “11” indicates 4
  • “10” indicates 3
  • “01” indicates 2
  • “00” indicates 1 as the bit value of the predetermined field included in the DCI.
  • “11” may be 3
  • “10” may be 2
  • “01” may be 1
  • “00” may be 0.
  • the UE determines that the DCI (1) is a predetermined DCI, and the total number of DCIs (here, four) transmitted to the UE based on the predetermined bit field “11” included in the DCI (1). ).
  • bit values of the predetermined fields included in each DCI (1)-(4) are set to be different values.
  • the predetermined field of the predetermined DCI (1) indicates the number of DCIs actually transmitted, and the predetermined fields included in the other DCI (2)-(4) have higher AL than the DCI (when the AL is the same) Indicates the number of DCIs (the CCE index is larger).
  • the UE may assume that DCI having a larger AL and CCE index than the DCI (4) is not transmitted. . That is, when the UE receives DCI (here, DCI (4)) in which the bit value of the predetermined field is “00”, the UE may perform control so as not to detect DCI having a larger AL and CCE index than the DCI. Good.
  • DCI here, DCI (4)
  • the UE may perform control such that at least one of the AL and CCE indexes is decoded with respect to the control resource set in which DCI (1)-(4) is set. For example, the UE decodes from CCEs having a low index among CCEs having a low AL. As a result, the number of decodings until DCI is detected (for example, until detection of all DCIs) can be reduced.
  • DCI (1)-(4) may be DCI transmitted in at least one of the same control resource set and the same search space. Thereby, even when CCE is set for each control resource set, it is possible to suppress a case where CCE indexes of DCI (1) to (4) overlap.
  • the base station uses the predetermined field included in the predetermined DCI corresponding to the predetermined AL and the predetermined CCE index in at least one of the predetermined control resource set and the search space, and relates to the number of DCIs to be detected by the UE. Information may be notified.
  • the predetermined control resource set (or search space) may be a control resource set (or search space) having the smallest index.
  • the UE may detect the DCI to be detected based on the bit value of a predetermined field included in the predetermined DCI in which at least one of the AL and CCE indexes is the lowest for the control resource set (or search space) having the smallest index.
  • the number may be determined.
  • DCI having the lowest CCE among the DCI having the lowest AL may be set as the predetermined DCI.
  • the UE may perform control so that at least one of the AL and CCE indexes is decoded for a predetermined control resource set in which at least a predetermined DCI (for example, DCI (1)) is set. .
  • a predetermined DCI for example, DCI (1)
  • the UE decodes a CCE having a low index among CCEs having a low AL in a predetermined control resource set. Thereby, it is possible to reduce the number of times of decoding until DCI (1) is detected (or until detection of all DCIs is completed).
  • the predetermined DCI used for notification of the number of DCIs that are actually transmitted is shown as the predetermined DCI used for notification of the number of DCIs that are actually transmitted, but is not limited thereto.
  • the predetermined DCI used for notification of the number of DCIs may be DCI (for example, DCI (4)) that maximizes at least one of the AL and CCE indexes.
  • the UE may determine the number of DCIs to be detected based on the bit value of the predetermined field included in the predetermined DCI in which at least one of the AL and CCE indexes is the highest (or the second highest).
  • DCI having the highest CCE among DCI having the highest AL may be set as the predetermined DCI. Since DCI with high AL can lower the error probability compared with DCI with low AL, by increasing the AL of a predetermined DCI used for notification of the number of DCIs, information on the number of DCIs can be appropriately given to the UE. You can be notified.
  • the UE may perform control so that decoding is performed from a higher one of the AL and CCE indexes. For example, the UE decodes from CCEs having a high index among CCEs having a high AL in a predetermined control resource set. As a result, the number of times of decoding until DCI (4) is detected (or until the detection of all DCIs is completed) can be reduced. In addition, UE may decode from CCE with a small index among CCE with low AL.
  • the base station at least one of information on the total number of DCIs (also referred to as the total number) transmitted to a certain UE in a predetermined period (for example, a slot) and information on the count value (also referred to as a cumulative value) of the DCI.
  • a predetermined period for example, a slot
  • the count value also referred to as a cumulative value
  • One is included in each DCI and notified to the UE (see FIG. 10).
  • FIG. 10 shows an example of a DCI field including a DCI total number notification field and a DCI count value notification field.
  • the total number of DCIs corresponds to, for example, the total number of DCIs actually transmitted to the UE during a predetermined period.
  • the base station may notify the UE of the total number using a predetermined field of each DCI (for example, it may be called a total DAI field).
  • the total number included in each DCI may be the same value.
  • the UE can actually detect the total number of DCIs to be transmitted based on the received DCI even if some of the DCIs are missed. Can be grasped.
  • the count value of DCI is used, for example, to count DCI actually transmitted to the UE during a predetermined period.
  • the base station may notify the count value of each DCI to the UE using a predetermined field (for example, a counter DAI field) of each DCI.
  • the count values included in each DCI may be different values. For example, the count value may be determined in the order of at least one of the PDCCH configuration, the control resource set, and the search space corresponding to each DCI.
  • the UE can grasp the count value of the DCI that has been misdetected even if some of the DCIs are missed.
  • the UE can appropriately grasp the total number of DCI even if the DCI with the last count value is missed. it can.
  • the total number and count value of DCI may be applied for each control resource set (or for each search space).
  • the total number and the count value are set for each control resource set ID (or each search space ID) based on the number of DCIs transmitted in each control resource set ID (or each search space ID).
  • the UE can control the DCI reception process by grasping the number of DCIs transmitted for each control resource set (or for each search space).
  • the total number and count value of DCI may be applied over all control resource sets (or all search spaces).
  • the total number and count value are set based on the number of DCIs transmitted in all control resource set IDs (or all search space IDs).
  • the UE can grasp the number of DCIs transmitted over all control resource sets (or all search spaces) and control the DCI reception process, the reception process can be simplified.
  • wireless communication system Wireless communication system
  • communication is performed using at least one combination of the plurality of aspects.
  • FIG. 11 is a diagram illustrating an example of a schematic configuration of the wireless communication system according to the present embodiment.
  • carrier aggregation (CA) and / or dual connectivity (DC) in which a plurality of basic frequency blocks (component carriers) each having a system bandwidth (for example, 20 MHz) of the LTE system as one unit are applied. can do.
  • DC dual connectivity
  • the wireless communication system 1 includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced 4G (4th generation mobile communication system), 5G. (5th generation mobile communication system), NR (New Radio), FRA (Future Radio Access), New-RAT (Radio Access Technology), etc., or a system that realizes these.
  • the radio communication system 1 includes a radio base station 11 that forms a macro cell C1 having a relatively wide coverage, and a radio base station 12 (12a-12c) that is arranged in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. It is equipped with. Moreover, the user terminal 20 is arrange
  • the user terminal 20 can be connected to both the radio base station 11 and the radio base station 12. It is assumed that the user terminal 20 uses the macro cell C1 and the small cell C2 at the same time using CA or DC. Moreover, the user terminal 20 may apply CA or DC using a plurality of cells (CC) (for example, 5 or less CCs, 6 or more CCs).
  • CC cells
  • Communication between the user terminal 20 and the radio base station 11 can be performed using a carrier having a relatively low frequency band (for example, 2 GHz) and a narrow bandwidth (also referred to as an existing carrier or a legacy carrier).
  • a carrier having a relatively high frequency band for example, 3.5 GHz, 5 GHz, etc.
  • the same carrier may be used.
  • the configuration of the frequency band used by each radio base station is not limited to this.
  • the user terminal 20 can perform communication using time division duplex (TDD) and / or frequency division duplex (FDD) in each cell.
  • TDD time division duplex
  • FDD frequency division duplex
  • a single neurology may be applied, or a plurality of different neurology may be applied.
  • Numerology may be a communication parameter applied to transmission and / or reception of a certain signal and / or channel, for example, subcarrier interval, bandwidth, symbol length, cyclic prefix length, subframe length. , TTI length, number of symbols per TTI, radio frame configuration, filtering process, windowing process, and the like.
  • the wireless base station 11 and the wireless base station 12 are connected by wire (for example, optical fiber compliant with CPRI (Common Public Radio Interface), X2 interface, etc.) or wirelessly. May be.
  • the radio base station 11 and each radio base station 12 are connected to the higher station apparatus 30 and connected to the core network 40 via the higher station apparatus 30.
  • the upper station device 30 includes, for example, an access gateway device, a radio network controller (RNC), a mobility management entity (MME), and the like, but is not limited thereto.
  • RNC radio network controller
  • MME mobility management entity
  • Each radio base station 12 may be connected to the higher station apparatus 30 via the radio base station 11.
  • the radio base station 11 is a radio base station having a relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission / reception point, or the like.
  • the radio base station 12 is a radio base station having local coverage, and includes a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head), and transmission / reception. It may be called a point.
  • the radio base stations 11 and 12 are not distinguished, they are collectively referred to as a radio base station 10.
  • Each user terminal 20 is a terminal that supports various communication schemes such as LTE and LTE-A, and may include not only a mobile communication terminal (mobile station) but also a fixed communication terminal (fixed station).
  • orthogonal frequency division multiple access (OFDMA) is applied to the downlink, and single carrier-frequency division multiple access (SC-FDMA) is used for the uplink.
  • SC-FDMA single carrier-frequency division multiple access
  • Frequency Division Multiple Access and / or OFDMA is applied.
  • OFDMA is a multi-carrier transmission scheme that performs communication by dividing a frequency band into a plurality of narrow frequency bands (subcarriers) and mapping data to each subcarrier.
  • SC-FDMA is a single carrier transmission in which the system bandwidth is divided into bands each composed of one or continuous resource blocks for each terminal, and a plurality of terminals use different bands to reduce interference between terminals. It is a method.
  • the uplink and downlink radio access schemes are not limited to these combinations, and other radio access schemes may be used.
  • downlink channels include a downlink shared channel (PDSCH) shared by each user terminal 20, a broadcast channel (PBCH: Physical Broadcast Channel), a downlink L1 / L2 control channel, and the like. Used. User data, higher layer control information, SIB (System Information Block), etc. are transmitted by PDSCH. Moreover, MIB (Master Information Block) is transmitted by PBCH.
  • PDSCH downlink shared channel
  • PBCH Physical Broadcast Channel
  • SIB System Information Block
  • MIB Master Information Block
  • Downlink L1 / L2 control channel is downlink control channel (PDCCH (Physical Downlink Control Channel) and / or EPDCCH (Enhanced Physical Downlink Control Channel)), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel) Including at least one of Downlink control information (DCI: Downlink Control Information) including PDSCH and / or PUSCH scheduling information is transmitted by the PDCCH.
  • PDCH Physical Downlink Control Channel
  • EPDCCH Enhanced Physical Downlink Control Channel
  • PCFICH Physical Control Format Indicator Channel
  • PHICH Physical Hybrid-ARQ Indicator Channel
  • DCI Downlink Control Information
  • scheduling information may be notified by DCI.
  • DCI for scheduling DL data reception may be referred to as DL assignment
  • DCI for scheduling UL data transmission may be referred to as UL grant.
  • the number of OFDM symbols used for PDCCH is transmitted by PCFICH.
  • the PHICH transmits HARQ (Hybrid Automatic Repeat reQuest) delivery confirmation information (for example, retransmission control information, HARQ-ACK, ACK / NACK, etc.) to the PUSCH.
  • HARQ Hybrid Automatic Repeat reQuest
  • EPDCCH is frequency-division multiplexed with PDSCH (downlink shared data channel), and is used for transmission of DCI and the like in the same manner as PDCCH.
  • an uplink shared channel (PUSCH) shared by each user terminal 20
  • an uplink control channel (PUCCH: Physical Uplink Control Channel)
  • a random access channel (PRACH: Physical Random Access Channel)
  • User data, higher layer control information, etc. are transmitted by PUSCH.
  • downlink radio link quality information CQI: Channel Quality Indicator
  • delivery confirmation information SR
  • scheduling request etc.
  • a random access preamble for establishing connection with the cell is transmitted by the PRACH.
  • a cell-specific reference signal CRS
  • CSI-RS channel state information reference signal
  • DMRS demodulation reference signal
  • PRS Positioning Reference Signal
  • a measurement reference signal SRS: Sounding Reference Signal
  • a demodulation reference signal DMRS
  • the DMRS may be referred to as a user terminal specific reference signal (UE-specific Reference Signal). Further, the transmitted reference signal is not limited to these.
  • FIG. 12 is a diagram illustrating an example of the overall configuration of the radio base station according to the present embodiment.
  • the radio base station 10 includes a plurality of transmission / reception antennas 101, an amplifier unit 102, a transmission / reception unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106.
  • the transmission / reception antenna 101, the amplifier unit 102, and the transmission / reception unit 103 may each be configured to include one or more.
  • User data transmitted from the radio base station 10 to the user terminal 20 via the downlink is input from the higher station apparatus 30 to the baseband signal processing unit 104 via the transmission path interface 106.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access
  • Retransmission control for example, HARQ transmission processing
  • scheduling transmission format selection, channel coding, Inverse Fast Fourier Transform (IFFT) processing, precoding processing, and other transmission processing
  • IFFT Inverse Fast Fourier Transform
  • precoding processing precoding processing, and other transmission processing
  • the downlink control signal is also subjected to transmission processing such as channel coding and inverse fast Fourier transform, and is transferred to the transmission / reception unit 103.
  • the transmission / reception unit 103 converts the baseband signal output by precoding for each antenna from the baseband signal processing unit 104 to a radio frequency band and transmits the converted signal.
  • the radio frequency signal frequency-converted by the transmission / reception unit 103 is amplified by the amplifier unit 102 and transmitted from the transmission / reception antenna 101.
  • the transmission / reception unit 103 can be configured by a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present disclosure.
  • the transmission / reception part 103 may be comprised as an integral transmission / reception part, and may be comprised from a transmission part and a receiving part.
  • the radio frequency signal received by the transmission / reception antenna 101 is amplified by the amplifier unit 102.
  • the transmission / reception unit 103 receives the uplink signal amplified by the amplifier unit 102.
  • the transmission / reception unit 103 converts the frequency of the received signal into a baseband signal and outputs it to the baseband signal processing unit 104.
  • the baseband signal processing unit 104 performs fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT: Inverse Discrete Fourier Transform) processing, and error correction on user data included in the input upstream signal.
  • FFT fast Fourier transform
  • IDFT inverse discrete Fourier transform
  • Decoding, MAC retransmission control reception processing, RLC layer and PDCP layer reception processing are performed and transferred to the upper station apparatus 30 via the transmission path interface 106.
  • the call processor 105 performs communication channel call processing (setting, release, etc.), status management of the radio base station 10, radio resource management, and the like.
  • the transmission path interface 106 transmits and receives signals to and from the higher station apparatus 30 via a predetermined interface.
  • the transmission path interface 106 transmits / receives signals (backhaul signaling) to / from other radio base stations 10 via an interface between base stations (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), X2 interface). May be.
  • CPRI Common Public Radio Interface
  • X2 interface May be.
  • the transmission / reception unit 103 may further include an analog beam forming unit that performs analog beam forming.
  • the analog beam forming unit includes an analog beam forming circuit (for example, phase shifter, phase shift circuit) or an analog beam forming apparatus (for example, phase shifter) described based on common recognition in the technical field according to the present invention. can do.
  • the transmission / reception antenna 101 can be configured by an array antenna, for example.
  • the transmission / reception unit 103 is configured to be able to apply single BF and multi-BF.
  • the transmission / reception unit 103 may transmit a signal using a transmission beam or may receive a signal using a reception beam.
  • the transmission / reception unit 103 may transmit and / or receive a signal using a predetermined beam determined by the control unit 301.
  • the transceiver 103 transmits a downlink (DL) signal (including at least one of a DL data signal (downlink shared channel), a DL control signal (downlink control channel), and a DL reference signal) to the user terminal 20. Then, an uplink (UL) signal (including at least one of a UL data signal, a UL control signal, and a UL reference signal) is received from the user terminal 20.
  • DL downlink
  • DL control signal downlink control channel
  • UL uplink
  • the transmission / reception unit 103 transmits one or more downlink control information used for scheduling a downlink shared channel transmitted from a plurality of transmission points.
  • the transmission / reception unit 103 may transmit association information set between at least one of a downlink control channel configuration, a search space, and a control resource set configuration and related information of the downlink shared channel. Further, the transmission / reception unit 103 may transmit information regarding the maximum number of downlink control information transmitted from a plurality of transmission points.
  • the transmission / reception unit 103 may transmit information regarding the number of downlink control information transmitted in a predetermined period using a predetermined field of downlink control information.
  • the transmission / reception unit 103 uses at least a predetermined field of the downlink control information, and includes at least information regarding the total number of downlink control information transmitted during a predetermined period and information regarding a counter value of the downlink control information transmitted during the predetermined period. One may be sent.
  • FIG. 13 is a diagram illustrating an example of a functional configuration of the radio base station according to the present embodiment.
  • the functional block of the characteristic part in this Embodiment is mainly shown, and it may be assumed that the radio base station 10 also has another functional block required for radio
  • the baseband signal processing unit 104 includes at least a control unit (scheduler) 301, a transmission signal generation unit 302, a mapping unit 303, a reception signal processing unit 304, and a measurement unit 305. These configurations may be included in the radio base station 10, and a part or all of the configurations may not be included in the baseband signal processing unit 104.
  • the control unit (scheduler) 301 controls the entire radio base station 10.
  • the control unit 301 can be configured by a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present disclosure.
  • the control unit 301 controls, for example, signal generation in the transmission signal generation unit 302, signal allocation in the mapping unit 303, and the like.
  • the control unit 301 also controls signal reception processing in the reception signal processing unit 304, signal measurement in the measurement unit 305, and the like.
  • the control unit 301 schedules system information, downlink data signals (for example, signals transmitted by PDSCH), downlink control signals (for example, signals transmitted by PDCCH and / or EPDCCH, delivery confirmation information, etc.) (for example, resource Control). In addition, the control unit 301 controls generation of a downlink control signal, a downlink data signal, and the like based on a result of determining whether or not retransmission control is necessary for the uplink data signal.
  • downlink data signals for example, signals transmitted by PDSCH
  • downlink control signals for example, signals transmitted by PDCCH and / or EPDCCH, delivery confirmation information, etc.
  • resource Control for example, resource Control
  • the control unit 301 controls transmission of DCI transmitted from a plurality of transmission points and scheduling of PDSCH using the DCI.
  • the transmission signal generation unit 302 generates a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) based on an instruction from the control unit 301, and outputs it to the mapping unit 303.
  • the transmission signal generation unit 302 can be configured by a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present disclosure.
  • the transmission signal generation unit 302 generates, for example, a DL assignment for notifying downlink data allocation information and / or a UL grant for notifying uplink data allocation information based on an instruction from the control unit 301.
  • the DL assignment and UL grant are both DCI and follow the DCI format.
  • the downlink data signal is subjected to coding processing, modulation processing, and the like according to a coding rate, a modulation scheme, and the like determined based on channel state information (CSI: Channel State Information) from each user terminal 20.
  • CSI Channel State Information
  • the mapping unit 303 maps the downlink signal generated by the transmission signal generation unit 302 to a predetermined radio resource based on an instruction from the control unit 301, and outputs it to the transmission / reception unit 103.
  • the mapping unit 303 can be configured by a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present disclosure.
  • the reception signal processing unit 304 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the reception signal input from the transmission / reception unit 103.
  • the received signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20.
  • the reception signal processing unit 304 can be configured by a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present disclosure.
  • the reception signal processing unit 304 outputs the information decoded by the reception processing to the control unit 301. For example, when receiving PUCCH including HARQ-ACK, HARQ-ACK is output to control section 301.
  • the reception signal processing unit 304 outputs the reception signal and / or the signal after reception processing to the measurement unit 305.
  • the measurement unit 305 performs measurement on the received signal.
  • the measurement unit 305 can be configured from a measurement device, a measurement circuit, or a measurement device described based on common recognition in the technical field according to the present disclosure.
  • the measurement unit 305 may perform RRM (Radio Resource Management) measurement, CSI (Channel State Information) measurement, and the like based on the received signal.
  • the measurement unit 305 includes received power (for example, RSRP (Reference Signal Received Power)), received quality (for example, RSRQ (Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio), SNR (Signal to Noise Ratio)).
  • Signal strength for example, RSSI (Received Signal Strength Indicator)
  • propagation path information for example, CSI
  • the measurement result may be output to the control unit 301.
  • FIG. 14 is a diagram illustrating an example of the overall configuration of the user terminal according to the present embodiment.
  • the user terminal 20 includes a plurality of transmission / reception antennas 201, an amplifier unit 202, a transmission / reception unit 203, a baseband signal processing unit 204, and an application unit 205.
  • the transmission / reception antenna 201, the amplifier unit 202, and the transmission / reception unit 203 may each be configured to include one or more.
  • the radio frequency signal received by the transmission / reception antenna 201 is amplified by the amplifier unit 202.
  • the transmission / reception unit 203 receives the downlink signal amplified by the amplifier unit 202.
  • the transmission / reception unit 203 converts the frequency of the received signal into a baseband signal and outputs it to the baseband signal processing unit 204.
  • the transmission / reception unit 203 can be configured by a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present disclosure.
  • the transmission / reception unit 203 may be configured as an integral transmission / reception unit, or may be configured from a transmission unit and a reception unit.
  • the baseband signal processing unit 204 performs FFT processing, error correction decoding, retransmission control reception processing, and the like on the input baseband signal.
  • the downlink user data is transferred to the application unit 205.
  • the application unit 205 performs processing related to layers higher than the physical layer and the MAC layer. Also, broadcast information of downlink data may be transferred to the application unit 205.
  • uplink user data is input from the application unit 205 to the baseband signal processing unit 204.
  • the baseband signal processing unit 204 performs transmission / reception units for retransmission control (for example, HARQ transmission processing), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, and the like. 203.
  • the transmission / reception unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band and transmits it.
  • the radio frequency signal frequency-converted by the transmission / reception unit 203 is amplified by the amplifier unit 202 and transmitted from the transmission / reception antenna 201.
  • the transmission / reception unit 203 may further include an analog beam forming unit that performs analog beam forming.
  • the analog beam forming unit includes an analog beam forming circuit (for example, phase shifter, phase shift circuit) or an analog beam forming apparatus (for example, phase shifter) described based on common recognition in the technical field according to the present invention. can do.
  • the transmission / reception antenna 201 can be configured by, for example, an array antenna.
  • the transmission / reception unit 203 is configured to be able to apply single BF and multi-BF.
  • the transmission / reception unit 203 may transmit a signal using a transmission beam, or may receive a signal using a reception beam.
  • the transmission / reception unit 203 may transmit and / or receive a signal using a predetermined beam determined by the control unit 401.
  • the transceiver 203 receives a downlink (DL) signal (including at least one of a DL data signal (downlink shared channel), a DL control signal (downlink control channel), and a DL reference signal) from the radio base station 10,
  • DL downlink
  • DL control signal downlink control channel
  • UL uplink
  • the transmission / reception unit 203 receives one or more downlink control information used for scheduling a downlink shared channel transmitted from a plurality of transmission points.
  • the transmission / reception unit 203 may receive association information set between at least one of a downlink control channel configuration, a search space, and a control resource set configuration and related information on the downlink shared channel. Further, the transmission / reception unit 203 may receive information regarding the maximum number of downlink control information transmitted from a plurality of transmission points.
  • the transmission / reception unit 203 may receive at least one of information related to the number of downlink control information transmitted in a predetermined period and related information of the downlink shared channel corresponding to the downlink control information transmitted in the predetermined period. Good.
  • the transmission / reception unit 203 may receive information on the number of downlink control information transmitted in a predetermined period using a predetermined field of downlink control information. Further, the transmission / reception unit 203 uses at least a predetermined field of the downlink control information, and includes at least information regarding the total number of downlink control information transmitted during a predetermined period and information regarding a counter value of the downlink control information transmitted during the predetermined period. One may be received.
  • FIG. 15 is a diagram illustrating an example of a functional configuration of the user terminal according to the present embodiment.
  • the functional block of the characteristic part in this Embodiment is mainly shown, and it may be assumed that the user terminal 20 also has another functional block required for radio
  • the baseband signal processing unit 204 included in the user terminal 20 includes at least a control unit 401, a transmission signal generation unit 402, a mapping unit 403, a reception signal processing unit 404, and a measurement unit 405. Note that these configurations may be included in the user terminal 20, and some or all of the configurations may not be included in the baseband signal processing unit 204.
  • the control unit 401 controls the entire user terminal 20.
  • the control unit 401 can be configured by a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present disclosure.
  • the control unit 401 controls, for example, signal generation in the transmission signal generation unit 402, signal allocation in the mapping unit 403, and the like.
  • the control unit 401 also controls signal reception processing in the reception signal processing unit 404, signal measurement in the measurement unit 405, and the like.
  • the control unit 401 acquires the downlink control signal and the downlink data signal transmitted from the radio base station 10 from the reception signal processing unit 404.
  • the control unit 401 controls the generation of the uplink control signal and / or the uplink data signal based on the result of determining the necessity of retransmission control for the downlink control signal and / or the downlink data signal.
  • the control unit 401 uses a downlink control channel (or downlink control) based on association information set between at least one of a downlink control channel configuration, a search space, and a control resource set configuration and related information on the downlink shared channel. Control information).
  • a downlink control channel or downlink control
  • association information set between at least one of a downlink control channel configuration, a search space, and a control resource set configuration and related information on the downlink shared channel. Control information).
  • control unit 401 may determine the maximum number of downlink control information transmitted from a plurality of transmission points based on information notified from the base station or a predetermined value. Further, the control unit 401 may determine that the aggregation levels of the plurality of downlink control information are the same when receiving a plurality of downlink control information. In addition, when communicating with a plurality of transmission points, the control unit 401 may determine a predetermined transmission point for monitoring a downlink control channel based on information notified from the base station. Further, the control unit 401 may control reception of at least one of information related to the number of downlink control information transmitted in a predetermined period and related information of the downlink shared channel corresponding to the downlink control information transmitted in the predetermined period. Good.
  • control unit 401 may determine the number of downlink control information transmitted in a predetermined period based on information included in the received downlink control information. Further, the control unit 401 determines the number of downlink control information transmitted in a predetermined period based on a predetermined field included in downlink control information corresponding to at least one of a predetermined control channel element and a predetermined aggregation level. Also good. Note that the information included in the predetermined field of each downlink control information may be different.
  • control unit 401 may stop detecting the downlink control information when the value of the predetermined field included in the received downlink control information is a predetermined value.
  • control unit 401 uses the predetermined field included in the downlink control information transmitted by applying at least one of the predetermined control resource set and the predetermined search space index, The number may be determined.
  • the transmission signal generation unit 402 generates an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) based on an instruction from the control unit 401 and outputs the uplink signal to the mapping unit 403.
  • the transmission signal generation unit 402 can be configured by a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present disclosure.
  • the transmission signal generation unit 402 generates an uplink control signal related to delivery confirmation information, channel state information (CSI), and the like based on an instruction from the control unit 401, for example. In addition, the transmission signal generation unit 402 generates an uplink data signal based on an instruction from the control unit 401. For example, the transmission signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal when the UL grant is included in the downlink control signal notified from the radio base station 10.
  • CSI channel state information
  • the mapping unit 403 maps the uplink signal generated by the transmission signal generation unit 402 to a radio resource based on an instruction from the control unit 401, and outputs the radio signal to the transmission / reception unit 203.
  • the mapping unit 403 can be configured by a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present disclosure.
  • the reception signal processing unit 404 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the reception signal input from the transmission / reception unit 203.
  • the received signal is, for example, a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) transmitted from the radio base station 10.
  • the reception signal processing unit 404 can be configured by a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present disclosure. Further, the reception signal processing unit 404 can constitute a reception unit according to the present disclosure.
  • the reception signal processing unit 404 outputs the information decoded by the reception processing to the control unit 401.
  • the reception signal processing unit 404 outputs, for example, broadcast information, system information, RRC signaling, DCI, and the like to the control unit 401.
  • the reception signal processing unit 404 outputs the reception signal and / or the signal after reception processing to the measurement unit 405.
  • the measurement unit 405 performs measurement on the received signal.
  • the measurement unit 405 can be configured from a measurement device, a measurement circuit, or a measurement device described based on common recognition in the technical field according to the present disclosure.
  • the measurement unit 405 may perform RRM measurement, CSI measurement, and the like based on the received signal.
  • the measurement unit 405 may measure reception power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like.
  • the measurement result may be output to the control unit 401.
  • each functional block is realized by using one device physically and / or logically coupled, or directly and / or two or more devices physically and / or logically separated. Alternatively, it may be realized indirectly by connecting (for example, using wired and / or wireless) and using these plural devices.
  • the radio base station, the user terminal, and the like in this embodiment may function as a computer that performs the processing of each aspect of this embodiment.
  • FIG. 16 is a diagram illustrating an example of a hardware configuration of the radio base station and the user terminal according to the present embodiment.
  • the wireless base station 10 and the user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. Good.
  • the term “apparatus” can be read as a circuit, a device, a unit, or the like.
  • the hardware configurations of the radio base station 10 and the user terminal 20 may be configured to include one or a plurality of each device illustrated in the figure, or may be configured not to include some devices.
  • processor 1001 may be implemented by one or more chips.
  • Each function in the radio base station 10 and the user terminal 20 is calculated by causing the processor 1001 to perform calculations by reading predetermined software (programs) on hardware such as the processor 1001 and the memory 1002, for example, via the communication device 1004. This is realized by controlling communication and controlling reading and / or writing of data in the memory 1002 and the storage 1003.
  • the processor 1001 controls the entire computer by operating an operating system, for example.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like.
  • CPU central processing unit
  • the baseband signal processing unit 104 (204) and the call processing unit 105 described above may be realized by the processor 1001.
  • the processor 1001 reads programs (program codes), software modules, data, and the like from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processes according to these.
  • programs program codes
  • software modules software modules
  • data data
  • the like data
  • the control unit 401 of the user terminal 20 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized similarly for other functional blocks.
  • the memory 1002 is a computer-readable recording medium such as a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically EPROM), a RAM (Random Access Memory), or any other suitable storage medium. It may be configured by one.
  • the memory 1002 may be called a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store a program (program code), a software module, and the like that can be executed to implement the wireless communication method according to the present embodiment.
  • the storage 1003 is a computer-readable recording medium such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM (Compact Disc ROM)), a digital versatile disk, Blu-ray® disk), removable disk, hard disk drive, smart card, flash memory device (eg, card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium It may be constituted by.
  • the storage 1003 may be referred to as an auxiliary storage device.
  • the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize frequency division duplex (FDD) and / or time division duplex (TDD). It may be configured.
  • FDD frequency division duplex
  • TDD time division duplex
  • the transmission / reception antenna 101 (201), the amplifier unit 102 (202), the transmission / reception unit 103 (203), the transmission path interface 106, and the like described above may be realized by the communication device 1004.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED (Light Emitting Diode) lamp, etc.) that performs output to the outside.
  • the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • the devices such as the processor 1001 and the memory 1002 are connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using a different bus for each device.
  • the radio base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable Gate Array), and the like. It may be configured including hardware, and a part or all of each functional block may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these hardware.
  • DSP digital signal processor
  • ASIC Application Specific Integrated Circuit
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • the channel and / or symbol may be a signal (signaling).
  • the signal may be a message.
  • the reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot, a pilot signal, or the like depending on an applied standard.
  • a component carrier CC: Component Carrier
  • CC Component Carrier
  • the radio frame may be configured by one or a plurality of periods (frames) in the time domain.
  • Each of the one or more periods (frames) constituting the radio frame may be referred to as a subframe.
  • a subframe may be composed of one or more slots in the time domain.
  • the subframe may have a fixed time length (eg, 1 ms) that does not depend on the neurology.
  • the slot may be configured by one or a plurality of symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain.
  • the slot may be a time unit based on the numerology.
  • the slot may include a plurality of mini slots. Each minislot may be configured with one or more symbols in the time domain. The minislot may also be called a subslot.
  • Radio frame, subframe, slot, minislot, and symbol all represent time units when transmitting signals. Different names may be used for the radio frame, subframe, slot, minislot, and symbol.
  • one subframe may be called a transmission time interval (TTI)
  • TTI transmission time interval
  • a plurality of consecutive subframes may be called a TTI
  • TTI slot or one minislot
  • a unit representing TTI may be called a slot, a minislot, or the like instead of a subframe.
  • TTI means, for example, a minimum time unit for scheduling in wireless communication.
  • a radio base station performs scheduling for assigning radio resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) to each user terminal in units of TTI.
  • the definition of TTI is not limited to this.
  • the TTI may be a transmission time unit of a channel-encoded data packet (transport block), a code block, and / or a code word, or may be a processing unit such as scheduling or link adaptation.
  • a time interval for example, the number of symbols
  • a transport block, a code block, and / or a code word is actually mapped may be shorter than the TTI.
  • one or more TTIs may be the minimum scheduling unit. Further, the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, or a long subframe.
  • a TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, or a subslot.
  • a long TTI (eg, normal TTI, subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (eg, shortened TTI) is less than the TTI length of the long TTI and 1 ms. It may be replaced with a TTI having the above TTI length.
  • a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers (subcarriers) in the frequency domain. Further, the RB may include one or a plurality of symbols in the time domain, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. One TTI and one subframe may each be composed of one or a plurality of resource blocks.
  • One or more RBs include physical resource blocks (PRB), sub-carrier groups (SCG), resource element groups (REG), PRB pairs, RB pairs, etc. May be called.
  • the resource block may be configured by one or a plurality of resource elements (RE: Resource Element).
  • RE Resource Element
  • 1RE may be a radio resource region of 1 subcarrier and 1 symbol.
  • the structure of the above-described radio frame, subframe, slot, minislot, symbol, etc. is merely an example.
  • the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in the slot, the number of symbols and RBs included in the slot or minislot, and the RB The number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and the like can be variously changed.
  • the information, parameters, and the like described in this specification may be expressed using absolute values, may be expressed using relative values from a predetermined value, or other corresponding information may be used. May be represented.
  • the radio resource may be indicated by a predetermined index.
  • names used for parameters and the like are not limited names in any way.
  • various channels PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.
  • information elements can be identified by any suitable name, so the various channels and information elements assigned to them.
  • the name is not limited in any way.
  • information, signals, etc. can be output from the upper layer to the lower layer and / or from the lower layer to the upper layer.
  • Information, signals, and the like may be input / output via a plurality of network nodes.
  • the input / output information, signals, etc. may be stored in a specific location (for example, a memory) or may be managed using a management table. Input / output information, signals, and the like can be overwritten, updated, or added. The output information, signals, etc. may be deleted. Input information, signals, and the like may be transmitted to other devices.
  • information notification includes physical layer signaling (eg, downlink control information (DCI), uplink control information (UCI)), upper layer signaling (eg, RRC (Radio Resource Control) signaling), It may be implemented by broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), MAC (Medium Access Control) signaling), other signals, or a combination thereof.
  • DCI downlink control information
  • UCI uplink control information
  • RRC Radio Resource Control
  • MIB Master Information Block
  • SIB System Information Block
  • MAC Medium Access Control
  • the physical layer signaling may be referred to as L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), or the like.
  • the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.
  • the MAC signaling may be notified using, for example, a MAC control element (MAC CE (Control Element)).
  • notification of predetermined information is not limited to explicit notification, but implicitly (for example, by not performing notification of the predetermined information or other information) May be performed).
  • the determination may be performed by a value represented by 1 bit (0 or 1), or may be performed by a boolean value represented by true or false.
  • the comparison may be performed by numerical comparison (for example, comparison with a predetermined value).
  • software, instructions, information, etc. may be transmitted / received via a transmission medium.
  • software can use websites, servers using wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and / or wireless technology (infrared, microwave, etc.) , Or other remote sources, these wired and / or wireless technologies are included within the definition of transmission media.
  • system and “network” used in this specification are used interchangeably.
  • base station BS
  • radio base station eNB
  • gNB gNodeB
  • cell gNodeB
  • cell group a base station
  • carrier a base station
  • a base station may also be called in terms such as a fixed station, NodeB, eNodeB (eNB), access point, transmission point, reception point, femtocell, and small cell.
  • the base station can accommodate one or a plurality of (for example, three) cells (also called sectors). If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, an indoor small base station (RRH: Remote Radio Head)) can also provide communication services.
  • a base station subsystem eg, an indoor small base station (RRH: Remote Radio Head)
  • RRH Remote Radio Head
  • the term “cell” or “sector” refers to part or all of the coverage area of a base station and / or base station subsystem that provides communication services in this coverage.
  • MS mobile station
  • UE user equipment
  • a mobile station is defined by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be called terminal, remote terminal, handset, user agent, mobile client, client or some other suitable terminology.
  • the radio base station in this specification may be read by the user terminal.
  • each aspect of the present disclosure / this embodiment may be applied to a configuration in which communication between a radio base station and a user terminal is replaced with communication between a plurality of user terminals (D2D: Device-to-Device). Good.
  • the user terminal 20 may have a function that the wireless base station 10 has.
  • words such as “up” and “down” may be read as “side”.
  • the uplink channel may be read as a side channel.
  • a user terminal in this specification may be read by a radio base station.
  • the wireless base station 10 may have a function that the user terminal 20 has.
  • the operation performed by the base station may be performed by the upper node in some cases.
  • various operations performed for communication with a terminal may include a base station and one or more network nodes other than the base station (for example, It is obvious that this can be done by MME (Mobility Management Entity), S-GW (Serving-Gateway), etc., but not limited thereto) or a combination thereof.
  • MME Mobility Management Entity
  • S-GW Serving-Gateway
  • each aspect / this embodiment described in this specification may be used alone, in combination, or may be switched according to execution. Further, the order of the processing procedures, sequences, flowcharts, and the like of each aspect / this embodiment described in this specification may be changed as long as there is no contradiction. For example, the methods described herein present the elements of the various steps in an exemplary order and are not limited to the specific order presented.
  • Each aspect described in this specification / this embodiment includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system, 5G (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New radio access), FX (Future generation radio access) ), GSM (registered trademark) (Global System for Mobile communications), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registration) (Trademark), systems using other appropriate wireless communication methods, and / or next-generation systems extended based on them may be applied.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-Advanced
  • the phrase “based on” does not mean “based only on”, unless expressly specified otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to elements using designations such as “first”, “second”, etc. as used herein does not generally limit the amount or order of those elements. These designations can be used herein as a convenient way to distinguish between two or more elements. Thus, reference to the first and second elements does not mean that only two elements can be employed or that the first element must precede the second element in some way.
  • determining may encompass a wide variety of actions. For example, “determination” means calculating, computing, processing, deriving, investigating, looking up (eg, table, database or other data). It may be considered to “judge” (search in structure), ascertaining, etc.
  • “determination (decision)” includes receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), access ( accessing) (e.g., accessing data in memory), etc. may be considered to be “determining”. Also, “determination” is considered to be “determination (resolving)”, “selecting”, “choosing”, “establishing”, “comparing”, etc. Also good. That is, “determination (determination)” may be regarded as “determination (determination)” of some operation.
  • connection is any direct or indirect connection between two or more elements or By coupling, it can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
  • the coupling or connection between the elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access”.
  • the radio frequency domain can be considered “connected” or “coupled” to each other, such as with electromagnetic energy having wavelengths in the microwave and / or light (both visible and invisible) regions.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
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Abstract

Selon la présente invention, afin de réaliser de manière appropriée une communication même lors d'une communication à l'aide de multiples points de transmission, ce terminal d'utilisateur est pourvu : d'une unité de réception qui surveille un canal de commande de liaison descendante et reçoit au moins un élément d'informations de commande de liaison descendante utilisé dans la programmation d'un canal partagé de liaison descendante transmis à partir de multiples points de transmission ; et d'une unité de commande qui, sur la base d'informations comprises dans les informations de commande de liaison descendante reçues, détermine le nombre d'éléments d'informations de commande de liaison descendante transmis dans une période de temps prescrite.
PCT/JP2018/022476 2018-06-12 2018-06-12 Terminal utilisateur Ceased WO2019239503A1 (fr)

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PCT/JP2018/022476 WO2019239503A1 (fr) 2018-06-12 2018-06-12 Terminal utilisateur
EP18922202.9A EP3809773A4 (fr) 2018-06-12 2018-06-12 Terminal utilisateur
JP2020524996A JP7252223B2 (ja) 2018-06-12 2018-06-12 端末、無線通信方法、基地局及びシステム
CN201880096129.3A CN112640547B (zh) 2018-06-12 2018-06-12 终端、无线通信方法、基站以及系统
US17/251,716 US20210127374A1 (en) 2018-06-12 2018-06-12 User terminal

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HUAWEI; HISILICON: "NR-PDCCH design for Multi-TRP coordinated transmission", 3GPP DRAFT; R1-1708132, vol. RAN WG1, 6 May 2017 (2017-05-06), Hangzhou, China, pages 1 - 5, XP051262267 *
NOKIA; NOKIA SHANGHAI BELL: "Remaining details on multi-TRP transmission", 3GPP DRAFT; R1-1714239, vol. RAN WG1, 20 August 2017 (2017-08-20), Prague, Czech Republic, pages 1 - 4, XP051317028 *
See also references of EP3809773A4

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EP3809773A4 (fr) 2022-01-26
CN112640547A (zh) 2021-04-09
JP7252223B2 (ja) 2023-04-04
EP3809773A1 (fr) 2021-04-21
CN112640547B (zh) 2024-02-13
JPWO2019239503A1 (ja) 2021-06-24
US20210127374A1 (en) 2021-04-29

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